Could someone proficient with Photoshop point me towards any good tutorials for people just starting out? If so, I'd really appreciate it.

This should start you off.

Remember to not go overboard on the layer transparencies and effects, especially lens flare.

Post some work here when you finish something.

Thanks Dive, I appreciate that.

I'm just looking for ideas to help me learn how to create signuratures and such...if someone could provide any additional help, it would be much appreciated.

Try here, this site even gives you game renders to use in your signature images.

Thanks again!